Do not capture the build-time value of $PATH in the 'emacs' executable
since this can noticeably increase the size of the closure of Emacs
with things like GCC being referenced.

--- a/lisp/loadup.el
+++ b/lisp/loadup.el
@@ -530,7 +530,8 @@ lost after dumping")))
                         ((equal dump-mode "dump") "emacs")
                         ((equal dump-mode "bootstrap") "emacs")
                         ((equal dump-mode "pbootstrap") "bootstrap-emacs.pdmp")
-                        (t (error "Unrecognized dump mode %s" dump-mode)))))
+                        (t (error "Unrecognized dump mode %s" dump-mode))))
+          (exec-path nil))
       (when (and (featurep 'native-compile)
                  (equal dump-mode "pdump"))
         ;; Don't enable this before bootstrap is completed, as the
